<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>Title</title>
</head>
<body>
  <form action="${pageContext.request.contextPath}/file/upload" method="post" enctype="multipart/form-data">
      用户名：<input type="text" name="username"><br/>
      文件：  <input type="file" name="photo"><br/>
      <input type="submit" value="提交">
  </form>
</body>
</html>
